Title

Nearly Ferromagnetic Spin-Triplet Superconductivity

Abstract

Spin-triplet superconductors potentially host topological excitations that are of interest for quantum information processing. We report the discovery of spin-triplet superconductivity in UTe2, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas. This superconducting phase stability suggests that UTe2 is related to ferromagnetic superconductors such as UGe2, URhGe, and UCoGe. However, the lack of magnetic order and the observation of quantum critical scaling place UTe2 at the paramagnetic end of this ferromagnetic superconductor series. A large intrinsic zero-temperature reservoir of ungapped fermions indicates a highly unconventional type of superconducting pairing.

Department(s)

Physics

Comments

U.S. Department of Energy, Grant DMR-1610349

International Standard Serial Number (ISSN)

1095-9203; 0036-8075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 American Association for the Advancement of Science (AAAS), All rights reserved.

Publication Date

01 Jan 2019

PubMed ID

31416960

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